Nokogiri. github.com/sparklemotion/noko…

I am a big fan of the Beautiful Soup python package. Tons of flexibility and super easy to learn and use

www.crummy.com/software/Beaut…

Cheerio:
github.com/cheeriojs/cheerio

There's even a Scraper as a Service: page.rest/ (discovered some time ago by @pugson – thanks mate! 🙌)

If it's important for your business build your own scraper system with Python and Beautifulsoup, if it's not, you use SaaS solution like www.apify.com/

www.npmjs.com/package/x-ray